package com.srini.servlets;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import com.srini.pojos.LoggedInUser;
import com.srini.util.Constants;

/**
 * Servlet Filter implementation class FrontControlFilter
 */
public class FrontControlFilter implements Filter {

	/**
	 * Default constructor.
	 */
	public FrontControlFilter() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {

		HttpServletRequest req = (HttpServletRequest) request;
		if (req.getRequestURI().contains("/tt")) {
			LoggedInUser user = (LoggedInUser) req.getSession().getAttribute(
					Constants.LOGGEDIN_USER);
			if (user == null) {
				req.getRequestDispatcher("/login.jsp").forward(request,
						response);
			} else {
				chain.doFilter(request, response);
			}
		} else {
			chain.doFilter(request, response);
		}
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		System.out.println("Initializing Filter...");
	}

}
